can protect
Regular verb: protect - protected- protected

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can protect
you can protect
he can protect
we can protect
you can protect
they can protect 	I can be protecting
you can be protecting
he can be protecting
we can be protecting
you can be protecting
they can be protecting	I can have protected
you can have protected
he can have protected
we can have protected
you can have protected
they can have protected	I can have been protecting
you can have been protecting
he can have been protecting
we can have been protecting
you can have been protecting
they can have been protecting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't protect
you can't protect
he can't protect
we can't protect
you can't protect
they can't protect 	I can't be protecting
you can't be protecting
he can't be protecting
we can't be protecting
you can't be protecting
they can't be protecting	I can't have protected
you can't have protected
he can't have protected
we can't have protected
you can't have protected
they can't have protected	I can't have been protecting
you can't have been protecting
he can't have been protecting
we can't have been protecting
you can't have been protecting
they can't have been protecting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I protect?
can you protect?
can he protect?
can we protect?
can you protect?
can they protect? 	can I be protecting?
can you be protecting?
can he be protecting?
can we be protecting?
can you be protecting?
can they be protecting? 	can I have protected?
can you have protected?
can he have protected?
can we have protected?
can you have protected?
can they have protected? 	can I have been protecting?
can you have been protecting?
can he have been protecting?
can we have been protecting?
can you have been protecting?
can they have been protecting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I protect?
can't you protect?
can't he protect?
can't we protect?
can't you protect?
can't they protect? 	can't I be protecting?
can't you be protecting?
can't he be protecting?
can't we be protecting?
can't you be protecting?
can't they be protecting? 	can't I have protected?
can't you have protected?
can't he have protected?
can't we have protected?
can't you have protected?
can't they have protected? 	can't I have been protecting?
can't you have been protecting?
can't he have been protecting?
can't we have been protecting?
can't you have been protecting?
can't they have been protecting?